C The sky is blue D Bubbles form on the surface of water when it is heated

C the sky is blue d bubbles form on the surface of

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C. The sky is blue. D. Bubbles form on the surface of water when it is heated.
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Question 1: Which of the following is a hypothesis? A. How does the combination of Fe and C affect the strength of metals? B. Hypoxia in seawater is caused by agricultural runoff. C. The sky is blue. D. Bubbles form on the surface of water when it is heated.
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Question 2: Classify each statement as an observation, a law, or a theory. 1) Chlorine is a highly reactive gas. 2) If elements are listed in order of increasing mass of their atoms, their chemical reactivity follows a repeating pattern. 3) Neon is an inert (or nonreactive gas). 4) The reactivity of elements depends on the arrangement of their electrons. observation law observation theory
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Matter Anything that occupies space and has mass Examples: air, desk, chair, person, animal = a substance Composition State (physical form) Solid Liquid Gas Elements Compounds Mixtures Classified by:
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Solids Packed close together and do not move (can vibrate) • Incompressible Retain shape and volume when placed in a new container Definite shape and volume Matter classified by physical form:
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Liquids Packed close together and can move (flow) • Incompressible Takes the shape of container Definite volume but indefinite shape Matter classified by physical form:
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  • Fall '13
  • PedroPatino
  • Chemistry, Chemical element, Chemical substance, Chemical compound, physical form

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